CN112920834B - Alkane deoxidation tower system for slowing down corrosion of tower wall - Google Patents
Alkane deoxidation tower system for slowing down corrosion of tower wall Download PDFInfo
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- CN112920834B CN112920834B CN202110094132.5A CN202110094132A CN112920834B CN 112920834 B CN112920834 B CN 112920834B CN 202110094132 A CN202110094132 A CN 202110094132A CN 112920834 B CN112920834 B CN 112920834B
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- tower
- deoxygenation
- alkane
- reboiler
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/10—Inhibiting corrosion during distillation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Oil, Petroleum & Natural Gas (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a paraffin deoxidation tower system for slowing down corrosion of a tower wall, which comprises: the tower bottom reboiler that deoxidizes, the distributor connects gradually reflux pump and strip tower through the pipeline, the reboiler setting is in the bottom of deoxidizer tower, the reboiler is connected with the nitrogen pipeline at the bottom of deoxidizer tower, nitrogen gas gets into the reboiler at the bottom of deoxidizer tower through the nitrogen pipeline in proper order, the deoxidizer tower, the top condenser, the reboiler at the bottom of deoxidizer tower, the top condenser of deoxidizer tower, discharge through torch blow down line, the alkane raw materials after the bottom of deoxidizer tower is handled flows into the storage tank through the bottom pump. The invention can effectively solve the problem of leakage caused by frequent corrosion of the tower wall and the tower internals at the periphery of the tower top of the deoxygenation tower and the connected pipelines.
Description
Technical Field
The invention relates to the technical field of alkane processing, in particular to an alkane deoxidation tower system for slowing down corrosion of a tower wall.
Background
Alkanes are a class of organic compounds in which carbon atoms in the molecule are all linked by single bonds and the remaining bonds are all hydrogen bonded, and are classified into cycloalkanes and alkanes. Alkanes have the general formula CnH2n +2 and are the simplest class of organic compounds. The main sources of alkanes are petroleum and natural gas, which are important chemical raw materials and energy materials.
Currently, a deoxygenation tower is usually used in the production of alkanes, and the main function of the alkane deoxygenation tower is to remove dissolved oxygen and water in normal alkane raw materials. Because the top of the deoxidation tower is in the oxygen and moisture environment for a long time, the tower wall and the internal parts of the tower and the connected pipelines around the top of the deoxidation tower are often corroded and leaked, and the safe and stable production of the device is directly influenced.
Disclosure of Invention
The invention aims to: the paraffin deoxidizing tower system for reducing corrosion of tower wall is provided in order to solve the problem that leakage is caused by frequent corrosion of the tower wall, tower internals and connected pipelines around the top of a deoxidizing tower.
In order to achieve the purpose, the invention adopts the following technical scheme: a paraffin deoxygenator column system for mitigating column wall corrosion, comprising: deoxygenation tower, strip tower, alkane feeding filter, charge pump, deoxygenation tower top of the tower condenser and the reboiler at the bottom of the deoxygenation tower, pending alkane raw materials pass through the pipeline and connect gradually in alkane feeding filter the charge pump with the deoxygenation tower, deoxygenation tower top of the tower condenser sets up the export at deoxygenation tower top, the export is through pipe connection torch blow-down line, set up the distributor in the deoxygenation tower, reflux pump and strip tower are connected gradually through the pipeline to the distributor, the reboiler setting is in at the bottom of the deoxygenation tower, the reboiler at the bottom of the deoxygenation tower is connected with the nitrogen pipeline, and nitrogen gas gets into reboiler at the bottom of the deoxygenation tower, deoxygenation tower through the nitrogen pipeline in proper order, the deoxygenation tower top of the tower condenser discharges through the torch blow-down line, and the alkane raw materials after the bottom of deoxygenation tower is handled flows into the storage tank through the bottom of the tower pump.
As a further description of the above technical solution:
and a heat exchanger tube pass is arranged between the storage tank and the deoxygenation tower.
As a further description of the above technical solution:
and a flow control valve is arranged between the heat exchanger tube pass and the deoxygenation tower.
As a further description of the above technical solution:
and the stripping tower is provided with a liquid level controller.
As a further description of the above technical solution:
and a high liquid level alarm and a low liquid level alarm are arranged on the liquid level controller.
As a further description of the above technical solution:
the upper bottom of the stripping tower is provided with at least one dewatering drum.
As a further description of the above technical solution:
the dehydration package is connected with the neutralization pond through a pipeline.
As a further description of the above technical solution:
the neutralization tank is an alkaline neutralization tank.
As a further description of the above technical solution:
thermometers are respectively arranged at the condenser at the top of the deoxygenation tower and the reboiler at the bottom of the deoxygenation tower.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the nitrogen pipeline is connected to a bottom reboiler groove discharge line at the bottom of the tower of the deoxygenation tower, nitrogen enters the deoxygenation tower through the nitrogen pipeline, oxygen gathered at the top of the tower is brought into an inlet of a condenser at the top of the deoxygenation tower by the nitrogen, the oxygen is cooled and then enters an outlet at the top of the tower, and the oxygen is discharged through a discharge line leading to a torch, so that the oxygen concentration at the top of the tower can be reduced, and the purpose of slowing down corrosion is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow diagram of process piping and instrumentation for a paraffin deoxygenation column system to mitigate column wall corrosion.
FIG. 2 is a schematic diagram of a paraffin deoxygenator column system for mitigating column wall corrosion.
Illustration of the drawings:
1. a deoxygenation tower; 2. a stripping column; 3. a paraffin feed filter; 4. a feed pump; 5. a tower top condenser of the deoxygenation tower; 6. a reboiler at the bottom of the deoxygenation tower; 6. a nitrogen line; 7. a torch vent line; 8. a dispenser; 9. a reflux pump; 10. a tower bottom pump; 11. a material storage tank; 12. a heat exchanger tube pass; 13. a flow control valve; 14. a liquid level controller; 15. dehydrating; 16. and (4) a neutralization tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a paraffin deoxygenator column system for mitigating column wall corrosion comprising: the method comprises the following steps: deoxygenation tower 1, strip tower 2, alkane feeding filter 3, charge pump 4, deoxygenation tower top of the tower condenser 5 and deoxygenation tower reboiler 6 at the bottom of the tower, pending alkane raw materials pass through the pipeline connect gradually in alkane feeding filter 3 feed pump 4 with deoxygenation tower 1, deoxygenation tower top of the tower condenser 5 sets up the export at deoxygenation tower 1 top, the export is through pipe connection torch blow-down line 7, set up distributor 8 in the deoxygenation tower 1, distributor 8 connects gradually reflux pump 9 and strip tower 2 through the pipeline, deoxygenation tower reboiler 6 at the bottom of the tower sets up the bottom of deoxygenation tower 1, deoxygenation tower reboiler 6 at the bottom of the tower is connected with nitrogen pipeline 61, and nitrogen gas gets into deoxygenation tower reboiler 6 at the bottom of the tower, deoxygenation tower 1, deoxygenation tower top of the tower condenser 5 through nitrogen pipeline 61 in proper order, discharges through torch blow-down line 7, and the alkane raw materials after deoxygenation tower bottom of the tower is handled flows into storage tank 11 through bottom of the torch pump 10.
A heat exchanger tube pass 12 is arranged between the storage tank 11 and the deoxygenation tower 1.
A flow control valve 13 is arranged between the heat exchanger tube side 12 and the deoxygenation tower 1. This allows the amount of overhead reflux to be adjusted.
The stripping tower 2 is provided with a liquid level controller 14; the liquid level controller 14 is provided with a high liquid level alarm and a low liquid level alarm. The liquid outflow in the tower that can prevent to strip improves the security, can improve the production utilization ratio of strip tower simultaneously.
A dewatering drum 15 is arranged at the upper bottom of the stripping tower 2; the dewatering drum 15 is connected with a neutralization pond 16 through a pipeline; the neutralization tank 16 is an alkaline neutralization tank. The main function of the stripping tower is to remove moisture in the raw material alkane, the moisture is evaporated to the top of the deoxidizing tower along with the material, and then the deoxidized material enters the stripping tower after being cooled by the tower top condenser, a dewatering drum is arranged at the bottom of the stripping tower, a field operator cuts water for the dewatering drum every 8 hours, and the cut water is weakly acidic, so that the neutralization tank 16 is an alkaline neutralization tank, and the treatment effect is improved.
And thermometers are respectively arranged at the condenser 5 at the top of the deoxygenation tower and the reboiler 6 at the bottom of the deoxygenation tower. The temperature of the condenser 5 at the top of the deoxygenation tower and the temperature of the reboiler 6 at the bottom of the deoxygenation tower can be monitored at any time, so that the separation efficiency of impurities in alkane is improved.
The working principle is that a raw material alkane liquid is pumped into a deoxygenation tower 1 from an alkane feeding filter 3 through a feeding pump 4, after being heated by a reboiler 6 at the bottom of the deoxygenation tower, light components, oxygen and water in the raw material alkane liquid are evaporated from the top, steam is condensed and cooled by a condenser 5 at the top of the deoxygenation tower and then enters a stripping tower 2, meanwhile, a nitrogen pipeline is connected to a discharging line of a reboiler groove at the bottom of the deoxygenation tower, nitrogen enters the deoxygenation tower through the nitrogen pipeline, the nitrogen brings oxygen gathered at the top of the tower into an inlet of the condenser at the top of the deoxygenation tower, the oxygen enters an outlet at the top of the tower after being cooled and is discharged through a vent line leading to a torch, light components at the top of the stripping tower are pumped out of the stripping tower 2 through a reflux pump, one part of the light components at the top of the stripping tower is refluxed, and the other part of the light components is sent out of the device; the normal paraffin with water and oxide removed is discharged from the bottom of the deoxygenation tower and pumped out by a tower bottom pump, and is sent to a storage tank 11 through the tube pass of a paraffin deoxygenation tower feeding heat exchanger and the heat exchange of tower feeding paraffin, and the flow rate of the normal paraffin is controlled by the liquid level at the bottom of the tower.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A paraffin deoxygenator column system for mitigating column wall corrosion, comprising: a deoxygenation tower (1), a stripping tower (2), an alkane feeding filter (3), a feeding pump (4), a deoxygenation tower top condenser (5) and a deoxygenation tower bottom reboiler (6), wherein alkane raw materials to be treated are sequentially connected with the alkane feeding filter (3), the feeding pump (4) and the deoxygenation tower (1) through pipelines, the tower top condenser (5) of the deoxygenation tower is arranged at an outlet at the top of the deoxygenation tower (1), the outlet is connected with a torch emptying line (7) through a pipeline, a distributor (8) is arranged in the deoxygenation tower (1), the distributor (8) is sequentially connected with a reflux pump (9) and a stripping tower (2) through pipelines, the reboiler (6) at the bottom of the deoxygenation tower is arranged at the bottom of the deoxygenation tower (1), the reboiler (6) at the bottom of the deoxygenation tower is connected with a nitrogen pipeline (61), nitrogen sequentially enters the reboiler (6) at the bottom of the deoxygenation tower, the deoxygenation tower (1) and the condenser (5) at the top of the deoxygenation tower through the nitrogen pipeline (61), discharged through a flare blow-down line (7), the alkane raw material treated at the bottom of the deoxygenation tower flows into a storage tank (11) through a tower bottom pump (10), at least one dewatering drum (15) is arranged at the upper bottom of the stripping tower (2), the dewatering drum (15) is connected with the neutralization pond (16) through a pipeline.
2. The alkane deoxygenation tower system for reducing corrosion of the tower wall according to claim 1, wherein a heat exchanger tube pass (12) is arranged between the storage tank and the deoxygenation tower (1).
3. The alkane deoxygenation column system for reducing corrosion of column wall according to claim 1, wherein a flow control valve (13) is arranged between the heat exchanger tube side (12) and the deoxygenation column (1).
4. The alkane deoxygenator column system for reducing corrosion of column wall according to claim 1, wherein a liquid level controller (14) is disposed on said stripping column (2).
5. The system of claim 4, wherein the liquid level controller (14) is provided with a high liquid level alarm and a low liquid level alarm.
6. The alkane deoxygenator column system with reduced corrosion of column wall according to claim 1, wherein said neutralization pond (16) is an alkaline neutralization pond.
7. The alkane deoxygenation tower system for reducing the corrosion of the tower wall according to claim 1, wherein thermometers are respectively arranged at the condenser (5) at the top of the deoxygenation tower and the reboiler (6) at the bottom of the deoxygenation tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110094132.5A CN112920834B (en) | 2021-01-25 | 2021-01-25 | Alkane deoxidation tower system for slowing down corrosion of tower wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110094132.5A CN112920834B (en) | 2021-01-25 | 2021-01-25 | Alkane deoxidation tower system for slowing down corrosion of tower wall |
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| Publication Number | Publication Date |
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| CN112920834A CN112920834A (en) | 2021-06-08 |
| CN112920834B true CN112920834B (en) | 2022-11-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205740904U (en) * | 2016-06-29 | 2016-11-30 | 北京石油化工工程有限公司 | Petroleum naphtha hydrogenation refines low pressure deoxidation and the system of charging heat exchange optimization |
| CN109135809B (en) * | 2018-08-06 | 2020-11-20 | 武汉金中石化工程有限公司 | Naphtha deoxidizing system and deoxidizing method |
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